A high toughness inorganic composite artificial stone panel and preparation method are disclosed. The panel includes a surface layer, an intermediate metal fiber toughening layer and a substrate toughening layer. The surface layer includes the following components: 40-70 parts of quartz sand, 10-30 parts of quartz powder, 20-45 parts of inorganic active powder, 0.5-4 parts of pigment, 0.3-1 part of water reducer and 3-10 parts of water. The intermediate metal fiber toughening layer includes the following components: 40-60 parts of inorganic active powder, 45-65 parts of sand, 0.8-1.5 parts of water reducer, 6-14 parts of water and 4-8 parts of metal fiber. The substrate toughening layer includes the following components: 30-50 parts of inorganic active powder, 30-55 parts of quartz sand, 15-20 parts of quartz powder, 0.5-1.2 parts of water reducer, 4-8 parts of water and 0.8-2.5 parts of toughening agent.

Multi-solid waste activated concretes with high-silicon iron ore tailings and preparation methods thereof are disclosed. In at least some embodiments, the concrete is prepared from raw materials including 360-380 kg/m.sup.3 of a cement, 30-40 kg/m.sup.3 of fly ash, 30-40 kg/m.sup.3 of a modified ultrafine sand of high-silicon iron ore tailings, 930-950 kg/m.sup.3 of a waste stone of tailings, 870-930 kg/m.sup.3 of a fine sand of tailings, 160-170 kg/m.sup.3 of water, and 4-8 kg/m.sup.3 of an additive.

Multi-solid waste activated concretes with high-silicon iron ore tailings and preparation methods thereof are disclosed. In at least some embodiments, the concrete is prepared from raw materials including 360-380 kg/m.sup.3 of a cement, 30-40 kg/m.sup.3 of fly ash, 30-40 kg/m.sup.3 of a modified ultrafine sand of high-silicon iron ore tailings, 930-950 kg/m.sup.3 of a waste stone of tailings, 870-930 kg/m.sup.3 of a fine sand of tailings, 160-170 kg/m.sup.3 of water, and 4-8 kg/m.sup.3 of an additive.

The present disclosure relates to an artificial agglomerated stone comprising micronized feldspar and to a method for its manufacturing.

Embodiments of the present disclosure relate to char bricks and methods of making char bricks. A composition (e.g., a char brick) includes about 0% to about 10% sand, about 30% to about 70% pyrolysis char (PC), and about 30% to about 60% cement. The PC has a particle size distribution from about 50 μm to about 500 μm. A method of making the composition includes mixing dry ingredients into a dry mixture, mixing the dry mixture with water to create a wet mixture; molding the wet mixture into a composition; and curing the composition. The dry ingredients include sand, pyrolysis char (PC), and cement. The PC has a particle size distribution from about 50 μm to about 500 μm.

In a method for manufacturing articles in the form of a slab or block, the articles are obtained from an initial mix comprising aggregates and a binder. Synthetic aggregates and fillers have a hardness greater than or equal to 5 Mohs, and contain silicon dioxide substantially only in amorphous form, the silicon dioxide in crystalline form being present in quantities of less than 1% by weight.

In a method for manufacturing articles in the form of a slab or block, the articles are obtained from an initial mix comprising aggregates and a binder. Synthetic aggregates and fillers have a hardness greater than or equal to 5 Mohs, and contain silicon dioxide substantially only in amorphous form, the silicon dioxide in crystalline form being present in quantities of less than 1% by weight.

Provided herein are compositions, methods, and systems related to 3D printing a reactive vaterite cement composition, comprising feeding a composition comprising reactive vaterite cement through a 3D printing machine; printing a 3D printed reactive vaterite cement product; and curing the 3D printed reactive vaterite cement product by transforming reactive vaterite cement in the 3D printed reactive vaterite cement product to aragonite and/or calcite during and/or after the curing.

Provided herein are compositions, methods, and systems related to 3D printing a reactive vaterite cement composition, comprising feeding a composition comprising reactive vaterite cement through a 3D printing machine; printing a 3D printed reactive vaterite cement product; and curing the 3D printed reactive vaterite cement product by transforming reactive vaterite cement in the 3D printed reactive vaterite cement product to aragonite and/or calcite during and/or after the curing.

Article made of conglomerate material comprising an aggregate comprising granules of expanded glass or expanded ceramic/clay and defining between them intergranular cavities, and a binder. The binder is present in the minimum quantity necessary for coating the expanded glass or expanded ceramic/clay granules, and the intergranular cavities contain only air and are free from filler material. Moreover, the binder is present in a volumetric quantity comprised between 6% and 12% of the total volume of the article.